Abstract
The objective of this work was to analyze the geometric distortions of aerial photographs mosaic derived from unmanned aerial vehicle (UAV) generated with data from a GPS navigation engaged in remotely piloted aircraft in relation to the field collected control points with an RTK . The imaging was performed on August 9, 2014, at UFMS research base in the Pantanal of Mato Grosso do Sul, with a fixed-wing aircraft and electric propulsion motor. The flight was conducted at an altitude of 150 m, planned in such a way to obtain pixels with about 4 cm spatial resolution. To check the accuracy of the mosaic were collected control points from a GNSS HIPER receiver. To ease the location of points on aerial photographs were made markings on the ground. Mosaic without control point presented displacement ranging from 6.30 m to 8,83m. Previously the tiles with 1, 2 and 3 control points had low errors, given the legislation for the georeferencing of rural properties. Products generated from controls points have high planialtimetric accuracy and are likely to use in jobs that require high positional accuracy, such as expertise services, registration and georeferencing of rural properties, crops analysis and flora and fauna quantification.
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